【正文】
e39。Unit 2 You should always go with someone. 1. Thanks to improvements in both health care and personal safety, most people are living healthier, longer 醫(yī)療保健及人身 安全的改善,大多數(shù)人活得更健康、更長壽。s made great progress in maths. ② 謝謝你的邀請,我玩得很開心。 3. Teenagers don39。 walk. 不要擔(dān)心,只有五分鐘的步行路程。 D 題意:他們將飛往夏威夷度兩周